/*******************************************************************************
 * Copyright (c) 2007, Geophysical Center RAS
 * Sergey Berezin, Dmitry Voitsekhovskiy
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * - Neither the name of the Geophysical Center RAS nor the names
 * of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using System.Diagnostics;

namespace DAI.ClientToolkit
{
    public class DataServiceResource
    {
        DataServiceStub _ds;
        string[] _activities = null;
        XmlElement _schema;

        public static TraceSwitch trace = new TraceSwitch("TraceEssePerform", "Esse Performing Trace");

        public DataServiceResource(DataServiceStub ds)
        {
            if (ds == null) throw new ArgumentNullException();
            _ds = ds;
        }

        public string[] Activities
        {
            get
            {
                if (_activities == null)
                {
                    GetResourcePropertyResponse p = _ds.GetResourceProperty(new XmlQualifiedName("activityTypes", Namespaces.Properties));
                    if (p.Any.Length != 1) throw new Exception("Assertion failed");
                    XmlNamespaceManager ns = new XmlNamespaceManager(new NameTable());
                    ns.AddNamespace("t", Namespaces.Types);
                    XmlNodeList a = p.Any[0].SelectNodes("//t:activity/@name", ns);
                    _activities = new string[a.Count];
                    for (int i = 0; i < a.Count; i++)
                        _activities[i] = a[i].Value;
                }
                return _activities;
            }
        }
        public XmlElement PerformSchema
        {
            get
            {
                if (_schema == null)
                {
                    GetResourcePropertyResponse p = _ds.GetResourceProperty(new XmlQualifiedName("performDocumentSchema", Namespaces.Properties));
                    if (p.Any.Length != 1) throw new Exception("Assertion failed");
                    XmlNamespaceManager ns = new XmlNamespaceManager(new NameTable());
                    ns.AddNamespace("t", Namespaces.Properties);
                    _schema = p.Any[0].FirstChild as XmlElement;
                }
                return _schema;
            }
        }
        public XmlElement Perform(object performDocument)
        {
            try
            {
                XmlSerializer xs = new XmlSerializer(performDocument.GetType());
                StringWriter sw = new StringWriter();
                xs.Serialize(sw, performDocument);
                string x = sw.ToString();
                
                // Debug dump to C:\temp\Perform.t
                 //StreamWriter w = new StreamWriter(@"c:\temp\perform.txt");
                 //w.WriteLine(x);
                 //w.Close();

                //trace.Level = TraceLevel.Verbose;
                //Trace.WriteLineIf(trace.TraceVerbose, string.Format("{0} Perform Document content:", DateTime.Now));
                //Trace.WriteLineIf(trace.TraceVerbose, x);
                //StreamWriter w = new StreamWriter(@"c:\log.txt");
                //w.WriteLine(x);
                //w.Close();

                XmlDocument doc = new XmlDocument();
                doc.LoadXml(x);
                _ds.Timeout = 1000000 * 300; // 5 min
                XmlElement element = _ds.perform(doc.DocumentElement);               

                return element;
            }
            catch(Exception ex)
            {
                Trace.WriteLineIf(trace.TraceVerbose, string.Format("{0} Perform exception:", DateTime.Now));
                Trace.WriteLineIf(trace.TraceVerbose, ex.Message + "\n\nStackTrace: " + ex.StackTrace);

                throw;
            }
        }
    }
}
